cast-iron

a cast-iron promise or arrangement is one that can be trusted completely (always before noun) No new business comes with a cast-iron guarantee of success.

Common Names:

Name	Pronounced	Usage
Orpheus	AWR-fee-əs (English)	Greek Mythology
PÁLl	POWTL (Icelandic)	Icelandic, Faroese
Adolphe	-	French
Mahmud	-	Arabic, Persian, Pashto, Bengali, Indonesian, Malay
Shonda	SHAWN-də	English
Victorinus	-	Late Roman